超细Al(OH)_3的粒度控制研究  

Study on the Control of Particle Size of Superfine AI(OH)_3 Powder

作　　者：钱程[1] 郝世雄[1] 刘兴勇[1] 罗霜[1] 兰雅婧[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2014年第1期23-27,共5页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：973国家重点基础研究发展计划(2011CB201202);自贡市科技局重点项目(2012H08);四川理工学院国家级大学生创新创业训练计划项目(201210622007)

摘　　要：采用铝酸钠种子分解法制备超细Al(OH)_3。用X射线衍射仪(XRD)表征了样品的晶相组成,用扫描电子显微镜(SEM)观察了样品的形貌,用激光粒度分析仪测定样品的粒度分布。研究了NaOH浓度、NaOH/Al(OH),摩尔比,分解温度,分解时间、晶种率和搅拌速率等因素对AL(OH)_3的粒度的影响。结果表明:NaOH浓度越高,分解温度越低,NaOH/Al(OH),摩尔比越小,得到的Al(OH),颗粒的粒度越小。试验条件为:NaOH浓度180 g/L,NaOH/Al(OH),摩尔比1.15,分解温度40℃,分解时间26 h,晶种率8%,搅拌速率200 rpm时,氢氧化铝颗粒的平均粒度为2.89μm。Superfine Al（ OH）3 powder is prepared by NaEAl2O4 seed decomposition. The crystalline phase of sample is analyzed by X-ray diffraction （XRD）. Its surface morphology is analyzed by scanning electron microscopy （SEM）. And the particle size distribution of the sample is characterized by laser particle size analyzer. The influences of sodium hydroxide con- centration, the molar ratio of sodium hydroxide and aluminum hydroxide, decomposition temperature, decomposition time, seed rate and stirring rate on the particle size of A1 （OH） 3 are investigated. The results show that higher concentration of sodium hydroxide, lower decomposition temperature, lower the molar ratio of sodium hydroxide and aluminum hydroxide, the smaller the particle size of superfine Al（OH） 3 powder are prepared. The experiment conditions are： NaOH concentration is 180 g/L, the molar ratio of sodium hydroxide and aluminum hydroxide is 1.15, the decomposition temperature is 40℃, decomposition time is 26 h, seed rate is 8% , and stirring rate isl00 rpm, then the average particle size of Al（OH） 3 particles is 2.89 μm.

关 键 词：超细氢氧化铝 铝酸钠 粒度 

分 类 号：TQ330.38[化学工程—橡胶工业]